616161619 has 2 divisors, whose sum is σ = 616161620. Its totient is φ = 616161618.

The previous prime is 616161613. The next prime is 616161641. The reversal of 616161619 is 916161616.

616161619 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-616161619 is a prime.

It is a super-2 number, since 2×616161619² = 759310281457402322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (616161613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 308080809 + 308080810.

It is an arithmetic number, because the mean of its divisors is an integer number (308080810).

Almost surely, 2^616161619 is an apocalyptic number.

616161619 is a deficient number, since it is larger than the sum of its proper divisors (1).

616161619 is an equidigital number, since it uses as much as digits as its factorization.

616161619 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11664, while the sum is 37.

The square root of 616161619 is about 24822.6029859884. The cubic root of 616161619 is about 850.9385798368.

The spelling of 616161619 in words is "six hundred sixteen million, one hundred sixty-one thousand, six hundred nineteen".